On 12.09.23 09:47, Adrian Hunter wrote:
On 12/09/23 10:19, David Hildenbrand wrote:
On 11.09.23 13:21, Adrian Hunter wrote:
Support for unaccepted memory was added recently, refer commit dcdfdd40fa82
("mm: Add support for unaccepted memory"), whereby a virtual machine may
need to accept memory before it can be used.
Do not let /proc/vmcore try to access unaccepted memory because it can
cause the guest to fail.
Oh, hold on. What are the actual side effects of this?
Once we're in the kdump kernel, any guest is already dead. So failing a guest doesn't apply, no?
Unaccepted Memory is used by virtual machines. In this case the guest
has kexec'ed to a dump-capture kernel, so the virtual machine is still
alive and running the dump-capture kernel.
Ah, I got lost in TDX host semantics. So what you're saying, if we
(guest) are reading unnaccepted memory we will get zapped. Makes sense.
--
Cheers,
David / dhildenb
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